13695989977 has 2 divisors, whose sum is σ = 13695989978. Its totient is φ = 13695989976.

The previous prime is 13695989971. The next prime is 13695990029. The reversal of 13695989977 is 77998959631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13028852736 + 667137241 = 114144^2 + 25829^2 .

It is a cyclic number.

It is not a de Polignac number, because 13695989977 - 2³¹ = 11548506329 is a prime.

It is not a weakly prime, because it can be changed into another prime (13695989971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6847994988 + 6847994989.

It is an arithmetic number, because the mean of its divisors is an integer number (6847994989).

Almost surely, 2^13695989977 is an apocalyptic number.

It is an amenable number.

13695989977 is a deficient number, since it is larger than the sum of its proper divisors (1).

13695989977 is an equidigital number, since it uses as much as digits as its factorization.

13695989977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 231472080, while the sum is 73.

The spelling of 13695989977 in words is "thirteen billion, six hundred ninety-five million, nine hundred eighty-nine thousand, nine hundred seventy-seven".